2262results about "Thermal non-catalytic cracking" patented technology

A method for reacting one or more hydrocarbons by steam cracking including conducting one or more input streams containing the one or more hydrocarbons, obtaining one or more product streams, through one or more radiation zones of one or more cracker furnaces, in which the one or more radiation zones are heated by firing heating gas with combustion air, in which at least a portion of the combustion air is subjected to combustion air preheating in which steam is produced from feed water, and in which the feed water is subjected to feed water preheating in one or more convection zones of the one or more cracker furnaces. The combustion air preheating is carried out at least in part and / or at least temporarily using heat withdrawn from at least part of the feed water upstream of the feed water preheating.

The invention relates to a method for processing a pyrolysis oil from plastics and / or solid recovered fuels, comprising: a) optional selective hydrogenation of the feedstock; b) hydroconversion in an ebullated bed, entrained bed and / or moving bed, in order to obtain a hydroconverted effluent; c) separation of the effluent from step b) in the presence of an aqueous stream to obtain a gaseous effluent, an aqueous effluent and a hydrocarbon liquid effluent; d) optional fractionation to obtain at least one gaseous stream and a fraction having a boiling point of less than or equal to 150° C. and a fraction having a boiling point of greater than 150° C.

[Problem] To provide a method for efficiently producing a chemical product from a waste material containing waste tires by improving each step in a series of processes to realize long-term operation of the processes. [Solution] This method for producing a chemical product involves a pyrolysis step for obtaining, through pyrolysis of a crushed product of a waste material including waste tires, a first gas component, a pyrolysis oil, and a residual component, a low-temperature hydrogenation step for subjecting a raw material oil containing at least part of the pyrolysis oil to a low-temperature hydrogenation treatment at a temperature of 180°C-350°C to obtain a low-temperature hydrogenated oil, a high-temperature hydrogenation step for subjecting a raw material oil containing at least part of the low-temperature hydrogenated oil to a hydrogenation treatment at a temperature higher than that of the low-temperature hydrogenation treatment to obtain a second gas component and a high-temperature hydrogenated oil, a separation step for separating a naphtha fraction from other fractions through atmospheric distillation of an atmospheric distillation raw material oil containing crude oil and at least part of the high-temperature hydrogenated oil, and a steam cracking step for subjecting a steam cracking raw material oil containing at least part of the naphtha fraction and / or other fractions to a steam cracking treatment to obtain a chemical product, wherein the amount of the pyrolysis oil with respect to the total amount of the first gas component, the pyrolysis oil, and the residual component in the pyrolysis step is 40% by mass or more.

Integrated processes and facilities for providing recycled content hydrocarbon products (r-products) from mixed waste plastic are provided. Carbon dioxide capture and energy recovery from one or more process streams described herein increase energy efficiency and help reduce overall environmental impact while producing valuable final products from chemically recycled waste plastic.

[Problem] To provide a method for efficiently producing a chemical product from waste tires by improving steps in a series of processes and also efficiently obtaining a carbide. [Solution] Provided is a method for producing a chemical product and a carbide, the method comprising: a thermal decomposition step for obtaining a first gas, a thermal decomposition oil and a residue through thermal decomposition of fragmented waste tires; a carbide recovery step for recovering a carbide from the residue; a low temperature hydrogenation step for subjecting a raw material oil containing at least a portion of the thermal decomposition oil to a low temperature hydrogenation treatment at a temperature of 180-350ºC to obtain a low temperature hydrogenated oil; a hydrocracking step for subjecting a raw material oil that contains at least a portion of the low temperature hydrogenated oil to a hydrocracking treatment at a temperature higher than that in the low temperature hydrogenation treatment so as to obtain a second gas, a light fraction having a boiling point of 350°C or lower and a heavy fraction having a boiling point of higher than 350°C; and a steam cracking step for steam cracking a steam cracking raw material oil that contains at least a portion of the light fraction so as to obtain a chemical product and a raw material for carbide production, which comprises a heavy fraction having a 10% distillation temperature of 190°C or higher. The thermal decomposition temperature in the thermal decomposition is 350-750ºC.

The invention discloses a furnace tube coking sensing and predicting method and system for a tubular cracking furnace. The method comprises the following steps: constructing digital twin bodies of the cracking furnace; virtual-real spatial data between the cracking furnace and the cracking furnace digital twinborn body are interacted; based on interactive virtual-real spatial data, in combination with multi-source data deep learning, a time-space dynamic change process of a temperature field, a pressure field and a flow field in a cracking furnace tube is reconstructed, and furnace tube coke cleaning or burning optimal opportunity prediction of furnace tube coke statistical inference and trend prediction is realized. The method has important significance for guaranteeing the safety of petrochemical production.

It has been discovered that heat energy may be captured from the flue gas from a pyrolysis reactor, which was previously lost due to exhausting. More particularly, it has been discovered that residual heat energy from pyrolysis flue gas in a chemical recycling facility may be used to preheat waste plastic streams and provide heat for waste plastic pyrolysis. Consequently, the pyrolysis processes and systems described herein may obtain a lower carbon footprint.

Chemical recycling facilities for processing mixed plastic waste are provided herein. Such facilities have the capability of processing mixed plastic waste streams and utilize a variety of recycling facilities, such as, for example, solvolysis facility, a pyrolysis facility, a cracker facility, a partial oxidation gasification facility, an energy generation / energy production facility, and a solidification facility. Streams from one or more of these individual facilities may be used as feed to one or more of the other facilities, thereby maximizing recovery of valuable chemical components and minimizing unusable waste streams.

A process for purifying a pyrolysis product. for example a pyrolysis oil and / or a pyrolysis gas. originating from pyrolysis of plastic waste is provided. wherein the process comprises contacting a vaporized pyrolysis oil with one or more adsorption materials and condensing the vaporized pyrolysis oil after it has been contacted with the one or more adsorption materials.

Systems and methods for processing a mixed plastic waste feed to produce a hydrogen-rich hydrocarbon product, such as synthetic crude oil or pyrolysis oil, by processing the mixed plastic waste feed through two cracking units. The first cracking unit is operated at a temperature and a residence time sufficient to at least partially depolymerize the plastic polymers in the mixed plastic waste feed to produce a molten oligomers product stream also containing inorganic components from the mixed plastic waste feed and a gas stream. This molten oligomers product stream is further processed in a thermal or a catalytic cracking unit to produce a hydrocarbonaceous stream that is processed to produce the hydrogen-rich hydrocarbon product, such as a synthetic crude oil that can be processed in a refinery or a pyrolysis oil that can be fed to a steam cracker.

A combustor component is disclosed comprising a combustion chamber, which comprises an oxidant inlet configured to receive a gas flow of an oxidant, a fuel inlet configured to receive a gas flow of a fuel into the combustion chamber, and a gases outlet configured to allow passage of a flow of exhaust gases from the combustion chamber. The combustor component is configured to facilitate separation of the gas flows of the oxidant and the fuel entering the combustion chamber prior to combustion of the fuel with the oxidant. A combustor assembly comprising a plurality of combustor components for staged combustion of a fuel with an oxidant, and related systems and methods for control and use of the combustor assembly, including in calcination processes, are also disclosed. A pyrolysis component, a pyrolysis assembly comprising a plurality of pyrolysis components, and related systems and methods using the pyrolysis component are also disclosed.

The invention relates to a process for converting plastics waste into pyrolysis oil for feeding to a steam cracker including the steps of: pre-washing a stream of comminuted waste plastics in a washing liquid comprising washing water and caustic solution; separating the pre-washed comminuted waste plastics to provide a stream of polyolefin-enriched washed comminuted plastics waste; thermally cracking the stream of polyolefin-enriched washed comminuted plastics waste to produce a vaporised hydrocarbon stream; condensing the vaporised hydrocarbon stream into a liquid hydrocarbon stream and gaseous hydrocarbon stream; washing the liquid hydrocarbon stream with caustic solution; separating the liquid hydrocarbon stream from the caustic solution to produce a stream of caustic-washed liquid hydrocarbon and a stream of spent caustic solution; and rinsing the caustic-washed liquid hydrocarbon stream with water; separating the rinsed liquid hydrocarbon stream from the rinsing water to produce a stream of pyrolysis oil and a stream of spent water.

The present invention relates to a furnace for heating a fluid feedstock, which comprises a radiation volume (1) and a convection volume (2) The radiation volume (1) comprises at least one electric heating device (12, 14, 9, 21).

The disclosure relates to a method for upgrading liquefied waste plastic, wherein the method includes a step of providing a liquefied waste plastic feed, a step of thermally cracking the liquefied waste plastic feed in a thermal cracking reactor, and a step of separating at least a fraction including ethylene from the effluent of the thermal cracking reactor, wherein the liquefied waste plastic feed has a content ratio of i-olefins to n-olefins of 3.0 or less. The disclosure also provides a liquefied waste plastic feed for thermal cracking.

The present invention relates to a process for the treatment of a plastics pyrolysis oil, comprising:a) the hydrogenation of said feedstock as a mixture with at least a part of the liquid effluent resulting from stage c) and in the presence of hydrogen and of a catalyst at a temperature between 14° and 340° C.;b) the hydrotreating of said hydrogenated effluent in the presence of hydrogen and of a catalyst;c) a separation of the hydrotreated effluent operated at high temperature and high pressure, in order to obtain a gaseous effluent and a liquid effluent, a part of which is recycled upstream of stage a),d) a separation operated at low temperature and high pressure and fed with the gaseous effluent and the other part of the liquid effluent resulting from stage c) and an aqueous solution, in order to obtain a hydrocarbon effluent.

It has been discovered that heat energy may be captured from various process streams in a chemical recycling facility, such as the pyrolysis effluent streams, pyrolysis gas streams, and pyrolysis flue gas streams. More particularly, it has been discovered that residual heat energy from various process streams in a chemical recycling facility may be used to preheat waste plastic streams and provide heat for waste plastic pyrolysis. Consequently, the pyrolysis processes and systems described herein may obtain a lower carbon footprint.

Electrical power derived from a renewable energy source is used to perform water electrolysis to produce oxygen and hydrogen. A flue gas and heat are produced from combustion of a fuel using at least a portion of the oxygen generated by electrolysis. A feed stream including hydrocarbon oil is hydroprocessed using the generated heat and at least a portion of the hydrogen generated by electrolysis to produce a product including a saturated hydrocarbon. At least a portion of the flue gas is hydrogenated using at least a portion of the hydrogen generated by electrolysis to produce a second product stream including a hydrocarbon, an oxygenate, or both.

A method for producing hydrocarbons includes subjecting a first feed stream to steam cracking to obtain a first product stream, and subjecting an ethane-containing second feed stream to oxidative dehydrogenation to obtain a second product stream. A portion of the first product stream is subjected to a deethanization or a depropanization separately from the second product to obtain a lighter fraction and a heavier fraction. A demethanization feed stream is formed by combining at least a portion of the lighter fraction and at least a portion of the second product stream and is subjected at least in part to demethanization. Partial oxygen removal is carried out during the formation of the demethanization feed stream. The oxygen removal is carried out downstream of the combining step.

The invention relates to the technical field of heavy oil product treatment, in particular to a method and device for co-production of a carbon material through molten salt pyrolysis of a liquid oil product, and the method comprises the following steps: the liquid heavy oil product is put into an electric heating molten salt reactor through a continuous feeding system, and the molten salt reactor is filled with a molten alkaline molten salt medium; carrying out catalytic pyrolysis reaction on the oil product in a liquid phase environment of the molten salt medium, wherein the oil product stays in the molten salt for 5-10 seconds; the liquid oil product is uniformly cracked in the liquid phase of the molten salt to generate low-carbon hydrocarbon gas, hydrogen and dispersed fine carbon particles, and the carbon particles suspend on the surface under the buoyancy action of the molten salt and are not deposited and gathered; suspended carbon particles are collected from the surface of the fused salt in real time through a mechanical push rod continuous collection system; according to the method, continuous and stable pyrolysis of the heavy oil product and efficient and continuous separation of the product can be realized in the liquid-phase molten salt environment, the production efficiency is improved, and the stability of the product quality is ensured.

A rotary bladed apparatus (100) for processing feedstocks in a process fluid is provided, said apparatus comprises means for adjusting position of a working blade cascade of the rotor (3) relative to stator components (2, 4) in a longitudinal direction of a rotor shaft (1). Adjustment is performed through axial displacement of the rotor (3) or, alternatively, through axial displacement of the reactor housing (22 A, 32A). A method for improving process efficiency and for regulating flow losses during processing of feedstocks in a process fluid, in particular, in off-design conditions in the bladed apparatus (100) is further provided. In embodiments, processing of feedstocks includes thermal- or thermochemical cracking of hydrocarbon-containing feedstock.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The invention is directed to chemical processing of light paraffins. The furnace unit of the hydrocarbon feedstock pyrolysis plant comprises a unified frame of the furnaces group of the pyrolysis plant, having a 3D-arched shape, indirect quenching exchangers, secured on the back end wall of the pyrolysis plant with an inlet nozzle opposite to the pyrolysis plant furnace outlet of the last reaction tube of pyrolysis coil, and the inner loop of the frame of pyrolysis unit furnaces group which is the same distance away from the casing of the pyrogas direct oil quenching column. Each furnace is individually connected with the pyrogas direct oil quenching column using its own transfer line. The circulating oil flow is supplied separately into each transfer line. The pyrogas and circulation oil are supplied into each transfer line by an injector device. An increase in the output of the pyrolysis plant for the processed raw materials along with an increase in the yield of target olefins to optimal parameters, optimal performance of each furnaces section of hydrocarbon feedstock pyrolysis plant and the furnace unit in whole, are provided.

A method for producing one or more hydrocarbons, includes subjecting a first feed stream to a steam cracking to obtain a first product stream and subjecting a second feed stream containing ethane to an oxidative dehydrogenation to obtain a second product stream At least a portion of the first product stream is subjected to a treatment to obtain hydrocarbon fractions. The treatment includes a selective hydrogenation of hydrocarbons having two carbon atoms and a demethanization. At least a portion of the second product stream is subjected to a trace removal, which comprises the removal of oxygen and / or acetylene, to obtain an subsequent stream. At least a portion of the subsequent stream is fed to the treatment at a position downstream of the selective hydrogenation and upstream of the demethanization. A portion of the subsequent stream is subjected to a carbon dioxide removal upstream of the feed point into the treatment.

The invention relates to the field of needle coke production, and discloses needle coke as well as a preparation method and application thereof. The strength of the needle coke is 25-34%; the thermal expansion coefficient of the needle coke is 0.8 * 10 <-6 > / DEG C to 1.2 * 10 <-6 > / DEG C; in the microstructure of the needle coke, the content of the mosaic structure is 0.1%-10%; the content of the small sheet structures is 10%-30%; the content of the large sheet structure is 15-40%; the content of the fine fiber structure is 10%-45%; and the content of the crude fiber structure is 10-45%. The needle coke provided by the invention has better optical structure, thermal expansion coefficient and strength, and is suitable for producing large-diameter and ultrahigh-power graphite electrodes and graphite electrode joints.

Provided herein are methods and systems for decontaminating and converting a mixed plastic waste feed to a hydro-gen-rich stream suitable for hydrocarbon refinery processing. Methods include the depolymerization of mixed plastic waste, removal of inorganic and metal contaminants, and feeding to one cracking unit or several cracking units in series. The products of the hydrocarbon refinery processing are high value chemicals such as C2-C4 olefins and benzene, toluene, xylenes, and ethyl benzene.

Recycled content liquified pyrolysis gas (r-LPyG) is produced using a process and system that optimizes the production, separation, liquification, storage, loading, and / or transporting of gases generated from the pyrolysis of waste plastic. The r-LPyG can be utilized in a variety of end use applications, including as a raw material for other chemicals and chemical intermediates.

Processes and facilities for providing recycled content hydrocarbon products (r-products) from the pyrolysis of waste plastic and cracking of the resulting recycled content streams are provided. Processing schemes are described herein that reduce overall water consumption, which helps increase energy efficiency and minimize overall environmental impact of the facility, while producing valuable final products from chemically recycled waste plastic.

A heat integration process and system for a chemical recycling facility is provided that can lower the carbon footprint and global warming potential of the facility. More particularly, one or more heat transfer media may be used to recover heat energy from a waste plastic pyrolysis effluent and redistribute the recovered heat energy throughout the chemical recycling facility. Thus, the global warming potential of the chemical recycling facility may be optimized and lowered due to the heat integration process and system herein.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The present invention relates to a method for upgrading liquefied waste plastics, the method comprising the steps of providing a liquefied waste plastics feed, pyrolyzing the liquefied waste plastics feed in a pyrolysis reactor, and separating at least one fraction comprising ethylene from the effluent of the pyrolysis reactor, wherein the liquefied waste plastics feed has a content ratio of i-olefins to n-olefins of 3.0 or less. The present invention further provides a liquefied waste plastics feed for pyrolysis.